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Showing 1 to 20 of 28 for “"Carbonate reservoirs"”.
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Data Analytics of Wettability Alteration with Surfactants in Carbonate Reservoirs
… been widely applied to improve oil recovery in carbonate reservoirs. An effective surfactant huff-puff application design requires comprehensive guidelines about where, how, and when this method could be applied. Besides, traditional methods to design an effective application and optimize …
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Optimization of chemical enhanced oil recovery methods for naturally fractured carbonate reservoirs
Carbonate oil reservoirs are important energy sources, accounting for over 60% of the world’s oil reserves. Recovering oil from these reservoirs is challenging, especially if they are naturally fractured. Waterflooding is inefficient because water flows through the highly permeable fractures and …
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Surfactant-free Aluminum Silicate-based Nanofluids for Enhanced Oil Recovery from Austin Chalk Carbonate Reservoirs
… of nanoparticles for enhancing oil recovery in carbonate reservoirs has received great attention from various researchers across the oil and gas industry. In contrast to sandstone reservoirs, carbonates are naturally neutral-wet or preferentially oil-wet. Understanding the mechanisms associated …
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Experimental study on enhanced oil recovery (EOR) mechanisms of nanogel combining with low salinity water for carbonate reservoirs
"Nanomaterials have been widely studied and applied in the oil and gas industry. Among the developed nanomaterials, nano-sized crosslinked polymeric gel particle (nanogel) has shown great potential in recovering residual oil and improving oil recovery. This dissertation carried out their potential …
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Use of 3D Seismic Azimuthal Iso-Frequency Volumes for the Detection and Characterization of High Porosity/Permeability Zones in Carbonate Reservoirs
… the production from conventional oil and gas reservoirs is the distribution of porosity and permeability within the producing geologic formation. The geometry of the pore space within these reservoirs, and the permeability associated with this pore space geometry, impacts not only where …
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Effects of Sedimentologic and Stratigraphic Heterogeneity on Production in Carbonate Reservoirs: An Integrated Outcrop, Synthetic Geologic Modeling, and Flow Simulation Study
… the many scales and types of heterogeneity in carbonate reservoirs; however, systematic quantitative assessment of the impact of this range of geological variations on production from carbonate reservoirs is rare. To explore and quantify the impact of geologic heterogeneity of hydrocarbon …
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An improved approach for quantifying the impact of geological uncertainty and modelling decisions on static and dynamic reservoir models - a case study from a giant fractured carbonate reservoir
Carbonate reservoirs hold more than 60% of the world's oil and 40% of the world's gas reserves. These reservoirs are characterised by geological heterogeneity, petrophysical complexity, presence of naturally fractures, and mixed wettability, all of which contribute to significant uncertainty in …
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Geology of Sub-Salt Carbonate Rocks in the Rozhkovsky Structure, Northern Precaspian Basin, Kazakhstan: Implications for the Formation of Carbonate Reservoir in a Relatively Closed Diagenetic System
Sub-salt carbonate successions in the Precaspian Basin host several world-famous oil/gas fields along the basin margin. The Early Carboniferous Sub-salt carbonate rocks are associated with the Rozhkovsky structure near the northern margin of the Precaspian Basin. These carbonate successions are …
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Syn-sedimentary tectonostratigraphic influence and isotopic δ18O and δ13C characterization of the Kimmeridgian Akimpech Formation, Campeche-Chiapas Subbasin (Campeche Sound), offshore Mexico.
Carbonate reservoirs are notoriously heterogeneous, with variability driven by both depositional and diagenetic controls. In such reservoirs, conceptual models play an important role in generating understanding and predictive insights. Yet, predictions are only as good as the conceptual models. …
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Geomechanical characterizations and correlations to reduce uncertainties of carbonate reservoir analysis
<p>"Although carbonate reservoirs hold a wealth of hydrocarbon, they are among the most difficult types of reservoirs to be characterized. Carbonate reservoirs by nature have complex depositional environments and diagenetic processes in which brittle, ductile, fractured rocks, and vugular pores may …
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Evaluation of alkali flooding combined with intermittent flow in carbonate reservoir
The majority of carbonate reservoir is oil-wet, which is an unfavorable condition for oil production. Generally, the total oil recovery after both primary and secondary recovery in an oil-wet reservoir is low. The amount of producible oil by enhanced oil recovery techniques is still large. Alkali …
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Integrated, Basin-To-Reservoir Scale, Geologic and Geophysical Studies of a Carbonate-Hosted, Hydrocarbon Reservoir of the La Vela Basin, Northwestern Venezuela
… thermogenic gas giant - hosted in a 300-m-thick, carbonate (red algae) reservoir - stimulated reevaluation of potential hydrocarbon reservoirs in Cenozoic carbonate rocks in northwestern South America. I use regional gravity and magnetic data integrated with a basin-scale database of 1100 km2 of …
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Caprock integrity evaluation for geosequestration of CO2 in depleted petroleum reservoirs.
… the CO2 can be stored in depleted petroleum reservoirs or aquifers - or, it might be necessary to inject CO2 with a small amount of these gas impurities to save cost. Moreover, during CO2 geosequestration in reservoirs, pressure variations during injection and storage could force some amount …
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Experimental investigation of imbibition in oil-wet carbonates under low IFT conditions
… drives and waterflooding in naturally fractured carbonate reservoirs with an oil-wet matrix generate very low oil production. Surfactants enhance oil recovery in these reservoirs by altering wettability and reducing interfacial tension (IFT). The main purpose of this research was to determine how …
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History matching sensitivity investigations and forecasting for low matrix porosity, permeability and highly fractured carbonate reservoir to optimize oil production in Kurdistan Region
… the reservoir engineers. Many highly fractured carbonate reservoirs with low matrix porosity and low matrix permeability in the world have been depleted with low ultimate recovery due to the improper management. To obtain higher oil recovery and an optimum oil production, a three dimensional …
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Analysis of Tripolitic Chert in the Boone Formation (Lower Mississippian, Osagean), Northwest Arkansas and Southwestern Missouri
… sequence of Lower Mississippian chert-bearing carbonates deposited by a single 3rd order transgression and regression. An abundant amount of chert that has replaced limestone highlights the Boone, but little is understood about the timing and development of chert in Lower Mississippian …
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Comprehensive evaluation of a novel EOR method-coupling low salinity water flooding and preformed particle gel to enhance oil recovery in fractured reservoirs
… economic and environmental problem as more reservoirs are maturing. Water channeling, one of the primary reservoir conformance problems, is caused by reservoir heterogeneities that lead to the development of high-permeability streaks. The recovery of oil from carbonate reservoirs is usually …
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Investigating and modeling tar-mats in a Kuwaiti carbonate reservoir and their role in understanding oil reserves and recovery economics
<p>"Tar-mat columns exist in many carbonate reservoirs in the Middle East. Historically, tar-mats have been thought to impede primary oil extraction, thus necessitating further improved oil recovery (IOR) technology applications. However, this research considers tar-mats as potential sources for …
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Novel insights into low salinity water flooding enhanced oil recovery in sandstone reservoirs
… oil recovery during LSWF in both sandstone and carbonate reservoirs is wettability alteration of the rock surface from oil-wet to water-wet. LS water imbibed into the low water-wet zones, the water wetness of the rock increased after injecting LS water, and in turn, microscopic sweep efficiency …
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Application of surfactant-polymer enhanced oil recovery in a high- salinity, high-temperature carbonate reservoir
… increases, and the discovery of new conventional reservoirs diminishes, the need of using enhanced oil recovery (EOR) methods, such as chemical flooding, grows. A widely used type of chemical EOR is surfactant-polymer flooding (SP). In SP flooding, a surfactant reduces the interfacial tension …
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